| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Happiness Journal : Six surprisingly simple daily practices that will change your life in 30 days or less. | 978-0-692-45686-6 (0-692-45686-4) | 2015 | |
| Share This Journal: A public journal documenting random acts of kindness. | 978-0-692-27858-1 (0-692-27858-3) | 2014 | Amy Gopel |
K.P. · Karel Pec · Karel Pecka · Karl Paech · Karl Pisa · Karl Pock · Karl Pusch